To farm stones you probably want to progess through the story on all difficulty levels and just let the bot run things and grab stones.
For me like I said above I'm using it to grind annoying things that take too much time out of my life and are boring.
I just ran 23-8 on super difficulty 6 times this morning using the bot in the span of a minute to walk away with over 100 green gems.. not bad at all.
So basically as far as i can tell best use would be to grab everything from a map.
for instance i am using it to run make way for toppo to grab those damn cubes. It’s much nicer to figure out how many times i can run the event put that in repeat and just select my team that gets the most bonuses and run the bot.
sure is nice to run something 10 times in less than a minute.